Middlings-purifier



(No Model.) 3 Sheath-Sheet 1.'

B. WHITMORE. MIDDLINGS PURIFIBR.

No. 458,511. Patented Aug. 25, 1591..-

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(No Model.)

3 Sheets-8heet 2.

E. B. WHITMORE. MIDDLINGS PURIFIER.

Patented Aug. 25., 1891.

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llllll (No Model.) 3 Sheets-Sheet 3.

E. BQWHITMORE. Q gIDDLINGS PURIPIER.

0 5- Patented Aug 5 NITED STATES PATENT EDYVIN B. IVHITMORE, OF THREE RIVERS, MICHIGAN.

MIDDLINGS-PURIFIEFL SPECIFICATION forming part of Letters Patent No. 458,511, dated August 25, 1891.

Application filed April 3, 1891, Serial No. 387,527. (No model.)

To all whom, it may concern; gles thereto, are strips or middlings-arresters Be it known that I, EDWIN B. WHITMORE, a cl. Another oblique series of inclined slightly citizen of the United States, residing at Three overlapping cant boards E, separated by R1vers,in the county of St. Joseph and State spacese,are arranged behind the series of cant- 5 of Michigan, have invented certain new and boards D in such position as that the miduseful Improvements in Middlings-Purifiers; dlingsarresters d will extend toward the midand I do hereby declare the following to be a width of the boards E under them. full, clear, and exact description of the inven- F is a shaft journaled transversely of the 60 tion, such as will enable others skilled in the casing in boxes f and is provided with an ce- IO art to which it appertains to make and use the centric F, that turns within an eccentric same. ring f, carried at one end of rod F which My invention relates toa middlings-purifier passes through the casing and is connected for cereals; and its object is to produce a maat its other end with shoe 0, whereby it is vi- 6:, chine which can be easily worked, is economi brated by the revolution of the shaft F.

cal in saving time and space, and will use the G is a spout to discharge purified midsame air over and over without discharging dlings, G a spout to discharge second midit into the room and taking it up again with dlings, and G a spout to discharge tailings. floating dust, thus rendering the product of The spout G is situated directly under the 70 the machine more pure and wholesome. shoe 0, and spouts G and G2 are alongside To these ends myinvention consists in certhereof, and all project in inclined position tain features of novelty to be hereinafter deto the outside of the casing. The wall 9 bescribed, and then particularly pointed out in tween the spouts G and G is prolonged upthe claims. wardly. In front of the shoe 0 is arranged a 75 In order that my invention may be fully shield-board g, inclined away from the shoe understood,I will now proceed to describe the and extending from the top part B of the same with reference to the accompanying casing. At the top of and to one side of the drawings, in which a casing is a rotary exhaust-fan H for causing Figure 1 is a vertical longitudinal section the air to circulate in a continuous current 80 of the machine. Fig. 2 is a side elevation through the machine. Communicating with thereof on a small scale. Fig.3is an end elethe opening H at the-side of the fan is a vation. Fig. & is a vertical transverse section dust-pocket h, open at top, from which a spout on line IV IV, Fig. 1. Fig. 5 is a horizontal h leads to the outside of the casing. section on line V V, Figs. 2, 3, and 4. Fig. 6 I is a vacuum dust-chamber below the 85 is a detail view of the fan and dust-pocket mouth of the fan.

3 5 and spout. Figs. 7 and 8 are detail views On one end of the fan-shaft H is a main showing the arrangement of the adjustable drive-pulley J, which may be driven from any slats. suitable or convenient source of power. On

a to indicate opposite sides of the casing of the other end of the shaft H is a belt-pulley go the machine, A A the ends, ofwhich end A j, over which and over a belt-pulley K passes is curved, and B B the top, of which part B a belt 10, said pulley being located at one end is lower than part B. of a transverse shaft K, journaled in boxes I) is the hopper, below which is an adj ust- K at the lower end of the machine. Meslr able cut-01f b for regulating the amount of ing bevel gear-wheels Z Z, fixed, respectively, 5 material falling out of the hopper. Below the on shaft K and shaft M, rotate the latter and hopper and cut-off is a vibrating shoe 0, supa spiral conveyer m or other suitable device ported by spring-bars c on the inner side of mounted thereon. The conveyer m works in the casing which hold it in position and pera trough N, extending longitudinally of the mit it to vibrate longitudinally of the casing. bottom of the casing. I00 Arranged in oblique series are inclined can't- Communicating at its upper end with dustboards D, which slightly overlap, leaving chamber I and at its lower end with conspaces d. Projecting downwardly from the veyer m is a spout O at one side of the maupper edges of the cant-boardsD, at right anchine. Y

Located on the end of fan-shaft H, contiguous to the pulley j, is another pulley P, over which and over pulley pat one. end of the shaft F a belt Q passes,so al tQlrotate the latter.

'1' is a valve for closing a hand-hole at one side of the machine, for affording access to valve 11, which closes an openin gin the transverse partition R at the side of the mouth of the fan. The mouth of the fan opens into a curved channel S, at the front and back of which are two curved series of adjustable slats s s, respectively, which form said channel between them. At the front side of the lower end of this channel is a vertical partition 15, arranged transversely of the casing.

Above the spiral con veyer m is a horizontal series of slats it. These slats operate similar to the folding slats of a window shutter, and each series is operated by a rod U, connected with the crank '12 on a rock-shaft V, Fig. '7. At one end of said shaft is an arm W', which is perforated for the passage of a pin 20, which engages one of a series of holes 20 in the casing and holds the slats to desired position.

X is a V-shaped divider-board arranged at the inner end of channel S, just in front of the mouth of the fan.

The operation of the machine is as follows: The middlings are fed through the hopper and fall onto the shoe, first falling against the upper cant-board E and the upper middlings-arrester d, then upon the next cantboard E below to permit the middlings to be thoroughly aerated, and so on down to the purified-middlings-discharge spout G, the arresters d preventing the heavier iniddlings from being thrown onto the cant-boards D. As the middlings pass through the intervals between the cant-boards, the air-currents (indicated by arrows 1 1) carry away and separate the dust and fiuif from the middlings. The dust-laden air-currents after passing through the cant-boards are deflected by the shield-board g in the direction of arrow 2 and strike the extended wall g, causing the heavier particles to fall into spout G. The air-currents then pass upwardly in the direction of arrow 3 and strike against the inclined partition Y, causing the heavier particles to fall into the spout G As the air passes onto the fan through its side opening H, as indicated by arrow 4, it must turn back over the edge of dust-pocket h, causing the heavier particles to fall thereinto. As the air passes out of the mouth of the fan, as indicated by arrow 5, the current is divided by the V-shaped divider-board X, passing in two currents, respectively, above and below it, as indicated by the arrows 6 and 7. The lower current is forced against the dust-arresters s, the heavier particles of the dust-laden air falling through between the slats into the vacuum-chamber I, and through the spouts O to conveyer m. The upper current is thrown against the outer wall of the dustchannel S, causing it to pass behind dust-arresters s, the heavier particles fallingthrough the expansion-chamber Z directly into conveyer 'm, and said current expanding in the chamber Z and passing upward through between the slats, as shown by arrows S 8. The air-current now passes up over the partition 15 back to the vibrating shoe, in the direction indicated by arrows 9, 10, and 11, and proceeds as before.

The air-regulating valve 7 is used to regulate the draft through the middlings as it passes over the cant-boards of the vibrating shoe. This is accomplished by opening said valve, when some of the dust-laden air passes direct from behind partition tto the fan.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a middlings-puritier, a vibrating shoe provided with two oblique series of spaced inclined cant-boards, one series being in advance of the other, and the boards of which series are provided at their upper edges with middlings-arresters' extending downwardly at right angles thereto and located directly opposite and also at right angles to the boards of the rear series, substantially as and for the purpose set forth.

2. In a middlings-purifier,avibrating shoe, a fan, a dust-chamber, a conveyer, a spout leading from the dust-chamber to the conveyer, and two series of slats arranged one on each side of an air-channel leading from the fan, substantially as and for the purpose set forth.

3. In a middlings-purifier, a vibrating shoe, a fan, an air-channel leading from the fan, a divider in front of the mouth of the fan, and a series of middlings-arresters on each side of the channel, substantially as and for the purpose set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

EDIVIN B. XVHITMORE.

Witnesses:

L. '1. WILooX, W. G. C LDWELL. 

